Check if an array contains the elements that match the specified conditions in C#


To check if an array contains the elements that match the specific conditions, we can use the StartsWith() method in C# −

Example

 Live Demo

using System;
public class Demo {
   public static void Main(){
      string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };
      Console.WriteLine("Products list...");
      foreach(string s in products){
         Console.WriteLine(s);
      }
      Console.WriteLine("\nOne or more products begin with the letter 'C'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("C")));
      Console.WriteLine("One or more planets begin with 'D'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("D")));
      Console.WriteLine("One or more products begin with the letter 'T'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("T")));
      Console.WriteLine("One or more planets begin with 'E'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("E")));
   }
}

Output

This will produce the following output −

Products list...
Electronics
Accessories
Clothing
Toys
Clothing
Furniture
One or more products begin with the letter 'C'? = True
One or more planets begin with 'D'? = False
One or more products begin with the letter 'T'? = True
One or more planets begin with 'E'? = True

Example

Let us see another example −

Live Demo

using System;
public class Demo {
   public static void Main(){
      string[] products = { "Electronics", "Accessories", "Clothing", "Toys", "Clothing", "Furniture" };
      Console.WriteLine("Products list...");
      foreach(string s in products){
         Console.WriteLine(s);
      }
      Console.WriteLine("Is the products Accessories in the array? = {0}",
      Array.Exists(products, ele => ele == "Accessories"));
      Console.WriteLine("Is the products Stationery in the array? = {0}",
      Array.Exists(products, ele => ele == "Stationery"));
      Console.WriteLine("\nOne or more products begin with the letter 'C'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("C")));
      Console.WriteLine("One or more planets begin with 'D'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("D")));
      Console.WriteLine("One or more products begin with the letter 'T'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("T")));
      Console.WriteLine("One or more planets begin with 'E'? = {0}",
      Array.Exists(products, ele => ele.StartsWith("E")));
   }
}

Output

This will produce the following output −

Products list...
Electronics
Accessories
Clothing
Toys
Clothing
Furniture
Is the products Accessories in the array? = True
Is the products Stationery in the array? = False
One or more products begin with the letter 'C'? = True
One or more planets begin with 'D'? = False
One or more products begin with the letter 'T'? = True
One or more planets begin with 'E'? = True
raja
Published on 04-Dec-2019 05:26:06
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